Form for casting concrete building blocks



E. L. FABIAN March 16, 1954 FORM FOR CASTING CONCRETE BUILDING BLOCKS Filed March 3, 1952 3 Sheets-Sheet l INVENTOR.

L... F'ABIAN E M L ATTORN EYS March 16, 1954 E. L. FABIAN FORM FOR CASTING CONCRETE BUILDING BLOCKS 3 Sheets-Sheet 2 Filed March 5, 1952 Emu. L,. FABIAN ATTORNEYS Mamh 1954 E. FABlAN ,67 4

FORM FOR CASTING CONCRETE BUILDING BLOCKS Filed. March 3, 1952 5 Sheets-Sheet 3 Patented Mar. 16, 1954 UNITED STATES PATENT OFFICE- FORM FOR CASTING CONCRETE BUILDING BLOCKS Emil L. Fabian, Los Angeles, Calif.

Application March 3, 1952, Serial No. 274,599

3 Claims. 1

The present invention relates to improvements in a form for casting concrete building blocks,

provide a form that is designed to leave dowelreceiving bores along the marginal edges of a cast block. At the same time, recesses are made in the block for receiving cross-tie rods, the latter being employed for interconnecting spacedapart wall units. Each bore has a companion recess communicatingtherewith so that it may be used for receiving a dowel, or a cross-tie rod,

depending upon the requirement at a particular location. 7

For a better understanding Of my invention, reference should be had to the accompanying drawings, forming part of this application, in

which:

Figure l is a top plan view of the assembled form, ready to have 'a block cast therein;

Figure 2 is a side elevational view thereof;

Figures 3' and 4 are longitudinal and transverse sectional views taken along the lines III-III and IV-IV, respectively, of Figure 1, and disclosing a block cast in the form;

Figure 5 is an enlarged fragmentary view of the lefthand portion of Figure 1, parts being shown in section;

Figures 6 and '7 are longitudinal sectional views taken along the planes VIVI and VII-VII, respectively, of Figure 5; V

Figure 8 is a transverse sectional view taken through a completed block;

Figure 9 is a vertical sectional view showing a partially-completed I wall fashioned from my blocks;

Figure 10 is an elevational view looking at the inner face of one of the building blocks; and

Figure '11Qis" an isometric view of thepanby V,

While I have shown only the preferred embodiment of my invention, it should be understood that various changes, or modifications, may be made within the scope of the annexed claims without departing from the spirit thereof.

Detailed description Referring to the drawings in detail, I have shown a pan designated generally at A, which is adapted to rest on a support surface B. This pan is substantially rectangular-shaped in outline, defining opposing side and end flanges l0 and II, respectively. These flanges extend upwardly and outwardly relative to the marginal bottom l2 of the pan. The remainder M of the pan bottom is arched upwardly, both longitudinally and transversely.

As clearly shown in Figures 1 to 6, inclusive, an external molding wall C of rectangular outline is adapted to be arranged around the pan A so as to provide a concrete-receiving space in which a building block D may be cast. This molding wall includes detachable side and end members l5 and I6, respectively, which are adapted to abut the flanges ID and H, respectively, of the pan.

It will be noted that these detachable members are provided by angle bars, which rest directly on the underlying supporting surface B. Elongated transverse bolts I! are secured to the vertical flanges l5a of the side members l5 so as to retain the latter up against the end members it. Obviously, upon withdrawing the bolts, the members l5|5 and l6l6 may be detached from the pan A to allow the latter and the cast block D to be removed.

A plurality, of tubular sleeves l8 are threadedly secured to the vertical flanges lea and Mia of the detachable members l5 and It, respectively. These sleeves are arranged at predetermined intervals along the lengths of these members, and have their bores extending horizontally (see Figures 4, 5 and 6). Core pins I9, which have been shown as being L-shaped, are telescoped through the tubular sleeves so as to extend horizontally into the concrete-receiving space of the form provided by the pan A and the external molding wall C. a

When .cementitious material, such as cement, is poured into the form, the core pins l9 provide bores 20 extending inwardly into each cast building block. made when the material hardens. Referring to Figures 8, 9 and 10, it will be seen that these bores are disposed at preselected intervals along the entire marginal edges of the block, that is, along the sides 2| and ends 22 of each block-' Moreover, a core element 23 has been provided adjacent to and immediately above each of the core pins [9. The purpose of these elements is to fashion recesses 24 in the marginal edges 2l-22 of the cast block. Each recess 24 merges into and communicates with its companion bore 20. These :ccre elements have been disclosed herein as being provided by hexagonal heads of bolts, which are secured to the flanges l5al.5a and [Ga-[Ba of the detachable members. This irregular shape of the core elements WillLDliOZi'dB undercuts 24a in the recesses 24 for the'purp'ose hereinafter described.

In Figures 6 and '7, I have disclosed the core elements as being coextensivewith the distances from the core pins to the upper edges .of the detachable members l5l5 and l6l6, thereby providing recesses extending from the bores 'to the'uppermost or inner face of each cast block. However, the bores extend inwardly into theblockbelow the bottoms of the recesses (see "Figure '8). The recesses 24 are formed at the juncture of the inner face "25 'of the block and the edges from which the bores 20 extend, with each recess merging into and communicating with one of the bores.

For the purpose 'of enhancing the appearance ofthe-building blocks-the flanges [band I I of the pan A'mayslope to produce bevelled edges 2 Bsurrounding the outer faces 21. Of course, the zarched portion "M of the pan will. produce a conceived-portion 21a on'the outer faces of the "blocks to thereby lighten the latter, While add-- ing decoration thereto.

It has been found that sand and gravel will provide a satisfactory mix for the building blocks. By omitting .rock, the cost 'may be reduced considerably. Longitudinal and transverse reiniorcingbarsiil and'29,'respectively, may be supportedon the core pins 119, as suggested in Figure 5,,.so as tobecome embedded in the interior of each block adjacent to the points of'imerger of the bores '20 and .the recesses'H. These bars produce a strong and durable block.

Next, I shall refer to Figure 9, wherein the lower course of a wall has beenflaid on a foundation'E. Dowels are inserted into- .preselected bores Zllbetween adjacentblocks in each course; and, also, between the blocks of adjacent courses. Thus, the dowels hold the blocks in place; Spaced-apart wall units WI and W2 are erected .on the foundation, and channel-shaped crosstierodslF are .providedlfor extending transversely between these wall units toretain them improper spaced relation with one another.

These cross-tie rods have legs '31, which .are telescoped into certain unoccupied bores 28 at the endsandalong the upper edges of the blocks. Asshowniniigure 9,.these .rods extend through those recesses 24 which .merge into .the bores 20 into which the .legs .31 .are introduced. It will be apparent that the bores and recesses have been :arranged to receive either .a dowel 3B or a cross-tie rod F.

As the :erection of the wall proceeds, concrete G is poured into the trench provided between the wall units WI and W2. A portion .of this concrete will flow .into the recesses 24 to provide [interlocks 32 between the blocks and the interposed concrete. Any unoccupied space .of the bores 20 :will be filled with this concrete. The undercuts 24a of the recesses .will increase the interlocking between the concrete G and the building blocks.

After a building block D has been cast in my form, it is allowed to set for a predetermined length of time. Thereafter, the side members l5i5 and end members l6l6 are detached, and may be used in connection with another pan for pouring another block. However, the block then resting :on the particular pan on which it was cast should be permitted to :remain thereon until the cementitious material has thoroughly set.

I claim:

1. 1m *a form for casting concrete building blocks: a pan adapted to rest on a supporting surface; this pan having a substantially rectangular marginal border, defining opposite sides and opposing ends; detachable side and end members abutting the sides and ends, respectively, of the pan to provide a substantially rectangular external molding wall surrounding the pan, which extends above the'latter to define a concrete-receiving space; core pins carried by the detachable members to project inwardlyinto the concrete-receiving .space from inner marginal surfaces of these members; and core .elements .carried by the detachable members adjacent to and in contacting relation with the .core pins.

2.111 a form for casting concrete building blocks; a pan adapted .to rest on a supporting surface; this .pan .havinga substantially rectan- .gular marginal border, defining opposite .sides and opposing ends; detachable side and end members abutting the sides :and lends, respectively, of the ,pan to provide a substantially rectangular external molding wall surrounding the pan, which extends .above the latter to define a concrete-receiving space; core pins carried by thezdetachable members to-pro-j ect inwardly .into the=concrete-receiving space from inner marginal surfaces of these members; :and core elements carried :by the detachable member adjacent to and in contacting relation with the core :pins; the core elements having irregular shaped heads projecting :into :said -.concrete-receiving space.

3. In a form for :oasting concrete building :blocks; a pan adapted to rest on a supporting surface; this ;pan having a substantially zrectangular vmarginal border, defining opposite sides and opposing ends; detachable side and end members abutting the sides and ends, respectively, of the .pan to .provide .a substantially .rectangular externa1 molding wall surrounding the pan, which extends above the latter to .define a concrete-receiving space; core pins carried by the detachable members to .project inwardly .into the concrete-receiving space from inner marginal surfaces :of these members; .and core elements carried by the detachable :members adjacent to .and inoontatcting relation with the core pins; the core elements "being coextensive with the distances from the core pins to the upper edges ef "the detachable members.

References Cited in the file of this patent UNITED (STATES .PATENFIS Number Name "Date 296,825 Dupuy Apr. 1 5, I884 1,604;0'34 Gillam et a1. Oct. 19,1926 2,037,545 Sexton Apr. 14, 1936 "2,181,959 Arborio Dec. 5, 1939 2,416,559 "Wilson n l-. .Feb. "25,, 19.47 2,583,626 Bull Jan. '29, 1952 

